Roller for cotton gins



Oct. 15, 1929. A. KARRER 1,731,534

ROLLER FOR COTTON GINS Filed June 50, 1928 Fig. 1

I 1 I I W 1 I I I A 4 Fig. 2

l at ented Oct. 15 1929 UNITED STATES PATENT OFFICE ANDRE KARRER, OF MULHOUSE-DORNAGH, FRANCE, ASSIGNOR TO SOC IETE ALSA CIENNE DE CONSTRUCTIONS MEGANIQUES, OF MULHOUSE, FRANGE ROLLER FOR COTTON GINS Application filed June 30, 1928, Serial No. 289,489, and in France July 7, 1927.

The present invention relates to cotton roller gins in which the fibres are carried forward by a roughened roller while the seeds adhering to the fibres are retained by a doctor knife pressed against the roller and are detached by a rapidly reciprocating beater blade.

The roller of these gins is ordinarily formed either of perforated leather washers threaded on a metal shaft of square section,

or of a wooden roller covered with a succession of independent straps or strips of leather disposed side by side and slightly inclined in relation to the axis of the roller.

The invention has for its object an improved roller of simpler and less costly coni struction than those hitherto known and which in addition has the advantage of being capable of providing long service by virtue 99 of means which permit of easily effecting the regulation of its working surface. The characteristic feature of this roller is that its working surface is formed by a single band of suitable material, more or less rough,

helically wound on the casing or barrel of the roller and secured at its ends to the roller, the attachment of both ends or of one only being provided by a device permitting of conveniently tensioning the band.

The accompanying drawings illustrate diagrammatically a roller constructed inaccordance with the invention. In these figures are shown also several structural'details which form part of the invention.

Fig. 1 is a View of the whole of theroller; Fig. 2 an axial section of one of its ends and Fig. 3 an end elevation of this end which is assumed to comprise a device for tensioning the band covering the surface of the roller. The roller is formed of a tube of sheet metal 1. secured at its ends by screws 2 to-cast end plates 3, which are themselves secured to the shaft 4 by set screws 5. The roller is W covered with a single band 6 of fabric of one or more suitable textile materials treated or not in a suitable manner so as to increase its roughness, or of leather, asbestos or any other material which is more or less rough. The two ends of the band 6 are attached to the roller. One at least of these ends 6 is at- 'tached by riveting to a plate 7 forming part of a screw threaded rod 8. The screw threaded rod 8 passes through a rib 9 on the end 3 and the band may be tensioned and restretched as desired by means of the nut 10. Sheet metal covers 11 (one of which is shown in Fig. 2 but is omitted from Fig. 3) close the ends of the rollers and cover the device or devices for tensioning the band 6. The sheet metal covers 11 are secured to the end plates 3 by means of screws 12.

What I claim is:

1. A roller for cotton gins comprising a tubular casing, end plates closing the ends of the casing and each provided on its outer face with a rib, a strip of fabric helically arranged on the casing and covering the same from end to end,'threaded rods attached to the ends of the strip and extending through openings in the ribs, nuts on said rods bearing against said ribs and coacting with the rods to tension said fabric strip.

2. A roller as claimed in claim 1, including also covers on the outer sides of the end plates enclosing the fabric ends and tensioning rods and nuts, said covers also having annular flanges which bear on and enclose the outer peripheral portions of the ends of the fabric strip.

In witness whereof I affix my signature.

ANDRE KARRER. 

